Browse Prior Art Database

High Performance Card On Board Packaging System

IP.com Disclosure Number: IPCOM000106975D
Original Publication Date: 1992-Jan-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 4 page(s) / 143K

Publishing Venue

IBM

Related People

Campbell, JS: AUTHOR [+3]

Abstract

This invention relates to the interconnection of circuit boards and cards utilizing a card on board cage packaging system. Technical advances in computer systems are demanding the ever increasing need for more connector I/O. Also, due to system requirements to minimize computer system downtime, the ability to "hot" plug connectors is becoming a basic connector requirement.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

High Performance Card On Board Packaging System

       This invention relates to the interconnection of circuit
boards and cards utilizing a card on board cage packaging system.
Technical advances in computer systems are demanding the ever
increasing need for more connector I/O. Also, due to system
requirements to minimize computer system downtime, the ability to
"hot" plug connectors is becoming a basic connector requirement.

      The disclosed invention obtains an improvement in connector
density over prior-art "hot" pluggable connectors by using pins as
small as 0.013" diameter.  This smaller pin size can be used without
concern of pin bending damage due to a unique card/connector
packaging system guidance method.  This unique packaging system
guidance method provides extremely accurate alignment of the
card/connector package, which minimizes unwanted bending forces that
could damage the connector pins during card plugging.

      As seen in Fig. 1, the design consists of the primary connector
housing/circuit carrier stiffener (1), a connector pin carrier block
(5), and one or more pieces of flex circuit (3) or other conductor to
carry signals from the conductive pins (6) to the printed circuit
card (4); and retention fastener (11) and a second half of the
connector housing (7).

      The conductive pins (6) mate with an appropriate connector
receptacle.  They are permanently retained in the pin carrier block
(5).  Conductors (3) are attached at one end to the pin (6) in the
pin carrier block (5), and on the other end to the printed circuit
carrier (4).  The pin/pinblock/conductor/circuit carrier assembly is
captivated by the primary connector housing/circuit carrier stiffener
(1) and the secondary connector housing (7).  The primary connector
housing/circuit carrier stiffener and the secondary connector housing
(7) are fastened together. Receptor slots (12) in the connector
housings (1) and (7) receive the retention bars (13) on the pin block
(5).  These serve to position and retain the pin block in the
connector housings.  The connector actuation/retention fastener (11)
is retained by being clamped between housings (1) and (7) in cavity
feature (15).

      Stiffening ribs (14) serve to support the weight of the circuit
carrier package and minimize the bow in the connector system during
plugging.  The card is fastened to the stiffening ribs of the primary
connector housing (1).

      Additional embodiments provide further unique features and
benefits.  Two options for card cooling are possible.  A standard
cold plate (air or water cooled) (9) could be captures by the
optional connector housing/circuit...